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321 lines
7.3 KiB
321 lines
7.3 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
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* Qwt Widget Library |
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* Copyright (C) 1997 Josef Wilgen |
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* Copyright (C) 2002 Uwe Rathmann |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the Qwt License, Version 1.0 |
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*****************************************************************************/ |
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#include <qpainter.h> |
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#include <qpen.h> |
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#include "qwt_painter.h" |
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#include "qwt_text.h" |
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#include "qwt_scale_map.h" |
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#include "qwt_scale_div.h" |
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#include "qwt_plot_grid.h" |
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class QwtPlotGrid::PrivateData |
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{ |
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public: |
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PrivateData(): |
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xEnabled(true), |
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yEnabled(true), |
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xMinEnabled(false), |
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yMinEnabled(false) { |
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} |
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bool xEnabled; |
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bool yEnabled; |
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bool xMinEnabled; |
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bool yMinEnabled; |
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QwtScaleDiv xScaleDiv; |
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QwtScaleDiv yScaleDiv; |
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QPen majPen; |
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QPen minPen; |
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}; |
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//! Enables major grid, disables minor grid |
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QwtPlotGrid::QwtPlotGrid(): |
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QwtPlotItem(QwtText("Grid")) |
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{ |
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d_data = new PrivateData; |
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setZ(10.0); |
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} |
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//! Destructor |
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QwtPlotGrid::~QwtPlotGrid() |
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{ |
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delete d_data; |
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} |
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//! \return QwtPlotItem::Rtti_PlotGrid |
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int QwtPlotGrid::rtti() const |
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{ |
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return QwtPlotItem::Rtti_PlotGrid; |
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} |
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/*! |
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\brief Enable or disable vertical gridlines |
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\param tf Enable (true) or disable |
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\sa Minor gridlines can be enabled or disabled with |
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enableXMin() |
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*/ |
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void QwtPlotGrid::enableX(bool tf) |
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{ |
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if ( d_data->xEnabled != tf ) { |
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d_data->xEnabled = tf; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Enable or disable horizontal gridlines |
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\param tf Enable (true) or disable |
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\sa Minor gridlines can be enabled or disabled with enableYMin() |
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*/ |
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void QwtPlotGrid::enableY(bool tf) |
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{ |
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if ( d_data->yEnabled != tf ) { |
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d_data->yEnabled = tf; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Enable or disable minor vertical gridlines. |
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\param tf Enable (true) or disable |
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\sa enableX() |
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*/ |
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void QwtPlotGrid::enableXMin(bool tf) |
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{ |
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if ( d_data->xMinEnabled != tf ) { |
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d_data->xMinEnabled = tf; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Enable or disable minor horizontal gridlines |
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\param tf Enable (true) or disable |
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\sa enableY() |
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*/ |
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void QwtPlotGrid::enableYMin(bool tf) |
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{ |
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if ( d_data->yMinEnabled != tf ) { |
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d_data->yMinEnabled = tf; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Assign an x axis scale division |
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\param scaleDiv Scale division |
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\warning QwtPlotGrid uses implicit sharing (see Qt Manual) for |
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the scale divisions. |
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*/ |
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void QwtPlotGrid::setXDiv(const QwtScaleDiv &scaleDiv) |
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{ |
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if ( d_data->xScaleDiv != scaleDiv ) { |
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d_data->xScaleDiv = scaleDiv; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Assign a y axis division |
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\param sy Scale division |
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\warning QwtPlotGrid uses implicit sharing (see Qt Manual) for |
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the scale divisions. |
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*/ |
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void QwtPlotGrid::setYDiv(const QwtScaleDiv &sy) |
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{ |
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if ( d_data->yScaleDiv != sy ) { |
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d_data->yScaleDiv = sy; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Assign a pen for both major and minor gridlines |
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\param p Pen |
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\sa setMajPen(), setMinPen() |
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*/ |
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void QwtPlotGrid::setPen(const QPen &p) |
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{ |
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if ( d_data->majPen != p || d_data->minPen != p ) { |
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d_data->majPen = p; |
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d_data->minPen = p; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Assign a pen for the major gridlines |
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\param p Pen |
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\sa majPen(), setMinPen(), setPen() |
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*/ |
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void QwtPlotGrid::setMajPen(const QPen &p) |
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{ |
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if ( d_data->majPen != p ) { |
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d_data->majPen = p; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Assign a pen for the minor gridlines |
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\param p Pen |
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*/ |
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void QwtPlotGrid::setMinPen(const QPen &p) |
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{ |
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if ( d_data->minPen != p ) { |
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d_data->minPen = p; |
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itemChanged(); |
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} |
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} |
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/*! |
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\brief Draw the grid |
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The grid is drawn into the bounding rectangle such that |
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gridlines begin and end at the rectangle's borders. The X and Y |
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maps are used to map the scale divisions into the drawing region |
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screen. |
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\param painter Painter |
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\param xMap X axis map |
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\param yMap Y axis |
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\param canvasRect Contents rect of the plot canvas |
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*/ |
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void QwtPlotGrid::draw(QPainter *painter, |
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const QwtScaleMap &xMap, const QwtScaleMap &yMap, |
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const QRect &canvasRect) const |
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{ |
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// draw minor gridlines |
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painter->setPen(d_data->minPen); |
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if (d_data->xEnabled && d_data->xMinEnabled) { |
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drawLines(painter, canvasRect, Qt::Vertical, xMap, |
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d_data->xScaleDiv.ticks(QwtScaleDiv::MinorTick)); |
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drawLines(painter, canvasRect, Qt::Vertical, xMap, |
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d_data->xScaleDiv.ticks(QwtScaleDiv::MediumTick)); |
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} |
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if (d_data->yEnabled && d_data->yMinEnabled) { |
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drawLines(painter, canvasRect, Qt::Horizontal, yMap, |
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d_data->yScaleDiv.ticks(QwtScaleDiv::MinorTick)); |
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drawLines(painter, canvasRect, Qt::Horizontal, yMap, |
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d_data->yScaleDiv.ticks(QwtScaleDiv::MediumTick)); |
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} |
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// draw major gridlines |
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painter->setPen(d_data->majPen); |
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if (d_data->xEnabled) { |
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drawLines(painter, canvasRect, Qt::Vertical, xMap, |
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d_data->xScaleDiv.ticks(QwtScaleDiv::MajorTick)); |
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} |
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if (d_data->yEnabled) { |
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drawLines(painter, canvasRect, Qt::Horizontal, yMap, |
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d_data->yScaleDiv.ticks(QwtScaleDiv::MajorTick)); |
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} |
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} |
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void QwtPlotGrid::drawLines(QPainter *painter, const QRect &canvasRect, |
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Qt::Orientation orientation, const QwtScaleMap &scaleMap, |
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const QwtValueList &values) const |
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{ |
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const int x1 = canvasRect.left(); |
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const int x2 = canvasRect.right(); |
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const int y1 = canvasRect.top(); |
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const int y2 = canvasRect.bottom(); |
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for (uint i = 0; i < (uint)values.count(); i++) { |
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const int value = scaleMap.transform(values[i]); |
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if ( orientation == Qt::Horizontal ) { |
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if ((value >= y1) && (value <= y2)) |
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QwtPainter::drawLine(painter, x1, value, x2, value); |
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} else { |
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if ((value >= x1) && (value <= x2)) |
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QwtPainter::drawLine(painter, value, y1, value, y2); |
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} |
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} |
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} |
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/*! |
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\return the pen for the major gridlines |
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\sa setMajPen(), setMinPen(), setPen() |
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*/ |
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const QPen &QwtPlotGrid::majPen() const |
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{ |
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return d_data->majPen; |
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} |
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/*! |
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\return the pen for the minor gridlines |
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\sa setMinPen(), setMajPen(), setPen() |
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*/ |
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const QPen &QwtPlotGrid::minPen() const |
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{ |
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return d_data->minPen; |
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} |
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/*! |
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\return true if vertical gridlines are enabled |
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\sa enableX() |
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*/ |
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bool QwtPlotGrid::xEnabled() const |
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{ |
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return d_data->xEnabled; |
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} |
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/*! |
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\return true if minor vertical gridlines are enabled |
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\sa enableXMin() |
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*/ |
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bool QwtPlotGrid::xMinEnabled() const |
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{ |
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return d_data->xMinEnabled; |
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} |
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/*! |
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\return true if horizontal gridlines are enabled |
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\sa enableY() |
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*/ |
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bool QwtPlotGrid::yEnabled() const |
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{ |
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return d_data->yEnabled; |
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} |
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/*! |
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\return true if minor horizontal gridlines are enabled |
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\sa enableYMin() |
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*/ |
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bool QwtPlotGrid::yMinEnabled() const |
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{ |
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return d_data->yMinEnabled; |
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} |
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/*! \return the scale division of the x axis */ |
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const QwtScaleDiv &QwtPlotGrid::xScaleDiv() const |
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{ |
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return d_data->xScaleDiv; |
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} |
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/*! \return the scale division of the y axis */ |
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const QwtScaleDiv &QwtPlotGrid::yScaleDiv() const |
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{ |
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return d_data->yScaleDiv; |
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} |
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void QwtPlotGrid::updateScaleDiv(const QwtScaleDiv& xDiv, |
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const QwtScaleDiv& yDiv) |
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{ |
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setXDiv(xDiv); |
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setYDiv(yDiv); |
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}
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